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New entries since:Wed Dec 31 16:00:00 1969
ID Date Author Type Category Subjectup Text Attachments
  648   Mon Apr 1 07:56:01 2019 GabrieleGeneralMeasurements S1600546 S1600551 S1600552 S1600554 2019-04-01


7:50am in
chamber

S1600546 in CR1
S1600551
in CR2
S1600552 in CR3
S1600554
  
  518   Fri Apr 13 10:39:04 2018 GabrieleGeneralMeasurements S1600620 S1600621 S1600623 S1600624 2018-04-13


10:37am
in chamber

S1600620 in CR1
S1600621
in CR2
S1600623 in CR3
S1600624
  
  500   Wed Mar 28 15:46:55 2018 GabrieleGeneralMeasurements S1800611 S1800612 S1800613 S18006142018-03-28


3:45pm in
chamber

S1800611 in CR1
S1800612
in CR2
S1800613 in CR3
S1800614
  
  501   Thu Mar 29 09:17:11 2018 GabrieleGeneralMeasurements S1800615 S1800616 S1800617 S1800618 2018-03-29


9:15am in
chamber

S1800615 in CR1
S1800616
in CR2
S1800617 in CR3
S1800618
  
  209   Wed Nov 23 08:55:41 2016 GabrieleGeneralNoise hunting"Advanced" vibration isolationIn normal conditions the RMS of the QPD
signals is dominated by the 58 Hz line generated
by the roughing pump. Also, when the modes
 2016-11-22_15.22.13.jpgvibration_isolation.png 
  180   Sat Nov 12 09:49:07 2016 GabrieleGeneralMeasurements12 substrates ready for MontrealThe 12 following substrates have been measured
and are ready for the first coating experiment
in Montreal:
 2016-11-12_09.45.42.jpg 
  445   Mon Dec 11 08:49:08 2017 Gabriele, Aaron, Brittany, SethGeneralMeasurements50mm / 0.5mm substrate from University Wafers
Installed in the test chamber CR0
Excitations:

Quiet
time before excitation: 1196822477
Excitation broadband: 1196822509
  
  15   Thu May 19 11:36:04 2016 GabrieleMechanicsDesignA first design of the disk assemblyHere are some screenshots of the disk assembly
and a look at how four of them will sit into
the vacuum chamber. The Solidworks models
 Screen_Shot_2016-05-18_at_3.41.06_PM.pngScreen_Shot_2016-05-18_at_3.40.43_PM.pngScreen_Shot_2016-05-18_at_3.41.25_PM.pngScreen_Shot_2016-05-18_at_3.41.33_PM.pngScreen_Shot_2016-05-18_at_3.41.25_PM.png 
  39   Tue Jul 12 17:19:07 2016 GabrieleElectronicsDaily ProgressADC and DAC cablingThis afternoon I completed the assembly
of the electronics boards to interface the
ADC and DAC. The ADC is interfaced with a
 2016-07-12_15.57.17.jpg2016-07-12_16.59.17.jpg2016-07-12_16.59.13.jpg 
  207   Tue Nov 22 08:21:35 2016 GabrieleElectronicsCharacterizationADC saturationLast night measurements didn't work
well: even without exciting the modes, the
ADC was saturating because of the low frequency
 10x 
  69   Thu Jul 28 17:15:22 2016 GabrieleElectronicsDaily ProgressADC/DAC interfaces upgradeInstalled the ADC and DAC boards into a
proper box. Also, swapped the temporary DAC
board (with cale hack) with the final one.
 2016-07-28_17.02.46.jpg2016-07-28_17.03.11.jpg 
  359   Thu Jun 29 16:40:41 2017 ZachElectronicsModelingAccurate model and force profile2017-06-29


I created
a much more accurate model of the current
ESD setup from the technical drawings. My
 Force.pnggeometry.pngMesh.png 
  261   Thu Jan 12 10:36:47 2017 GabrieleElectronicsConfigurationAdded ESD bias path to model CR0I added to the model CR0 an additional
bias path for the ESD driver:

 Screenshot.pngScreenshot-Untitled_Window.png 
  472   Thu Mar 1 16:25:13 2018 GabrieleGeneralGeneralAging testsHere's a ongoing summary of the substrate
aging tests.

S1600619

Mark
 18x 
  430   Thu Sep 14 15:59:10 2017 GabrieleFacility All wrapped up for Saturday plumbing work   2017-09-14_14.03.21.jpg2017-09-14_14.03.53.jpg2017-09-14_14.04.15.jpg 
  149   Thu Oct 27 14:02:38 2016 AlenaGeneralGeneralAnnealingAnnealing run (447-448) on 3" wafers
- Crime 10/27/2016 https://dcc.ligo.org/T1600485-v1

 
  
  453   Thu Jan 25 15:33:51 2018 Gabriele, BenGeneralAnnealingAnnealing of 50mm disksAnnealing of 8 fused silica substrates
(50mm/0.5mm) started at 3:30pm, January 25th
2018. Standard program: 9 hours ramp up to
  
  508   Sun Apr 1 10:11:22 2018 GabrieleGeneralGeneralAnnealing on blanksStarted annealing of blank disks: S1600541
S1600542 S1600545 S1600546 S1600551 S1600552
S1600554 S1600555
  
  155   Tue Nov 1 15:34:49 2016 Alena, CalumGeneral Annealing runAnnealing run (449-453) on 3" wafers
- Crime 11/01/2016 https://dcc.ligo.org/T1600507
  
  160   Fri Nov 4 16:16:23 2016 AlenaGeneralGeneralAnnealing runAnnealing run (454-459) on 3" wafers
- Crime 11/02/2016 https://dcc.ligo.org/LIGO-T1600510

Annealing
run (460-465) on 3" wafers - Crime 11/04/2016
  
  174   Thu Nov 10 16:07:13 2016 Alena, CalumGeneralGeneralAnnealing runAnnealing run (466-471) on 3" wafers
- Crime 11/10/2016

https://dcc.ligo.org/LIGO-T1600524
  
  184   Mon Nov 14 08:54:49 2016 Alena, CalumGeneralGeneralAnnealing runAnnealing run (472-477) on 3" wafers
- Crime 11/11/2016 https://dcc.ligo.org/T1600527
  
  489   Sat Mar 24 17:03:57 2018 GabrieleGeneralGeneralAnnealing runStarted annealing of S1600577 S1600580
S1600582 S1600585 at 5pm

ramp up to 600C at 100C/h
  
  491   Sun Mar 25 17:10:04 2018 GabrieleGeneralGeneralAnnealing runStarted annealing of S1600579 S1600581
S1600583 S1600586 at 5:00pm


ramp up to 300 C at 100
  
  494   Mon Mar 26 16:10:03 2018 GabrieleGeneralGeneralAnnealing runStarted annealing of S1600579 S1600581
S1600583 S1600586 at 5:00pm


ramp up to 400 C at 100
  
  496   Tue Mar 27 11:41:06 2018 GabrieleGeneralGeneralAnnealing runAt 11:35am, started annealing of ten fused
silica wafers (50.8mm / 0.1 mm) [S1800611 S1800612 S1800613 S1800614 S1800615 S1800616 S1800617 S1800618 S1800619 S1800620]


ramp up to 900 C at 100
 IMG_4259.PNGIMG_5083.pngIMG_4259.pngIMG_7803.pngIMG_8765.png 
  499   Wed Mar 28 15:32:07 2018 GabrieleGeneralGeneralAnnealing runStarted annealing of S1600579 S1600581
S1600583 S1600586 at 3:25pm


ramp up to 500 C at 100
  
  502   Thu Mar 29 16:15:08 2018 GabrieleGeneralGeneralAnnealing runSamples S1600519 S1600522 S1600565 S1600566 S1600567 S1600568 S1600569


ramp up to 500C at 100C/h
hold
at 500C for 10h
ramp down at 100C/h
  
  506   Sat Mar 31 09:58:56 2018 GabrieleGeneralGeneralAnnealing runStarted annealing of S1600579 S1600581
S1600583 S1600586 at 7:00pm 03/30


ramp up to 600 C at 100
  
  263   Wed Jan 18 14:29:16 2017 AlenaGeneralAnnealingAnnealing run (489-490) on 3" wafers - Crime 01/18/2017
Started annealing run Annealing run
(489-490) on 3" wafers - Crime 01/18/2017
 Prepairing_for_annealing_489_490.jpgIn_the_furnace_489_490.jpg 
  269   Fri Jan 20 16:00:36 2017 AlenaGeneralAnnealingAnnealing run (491-496) on 3" wafers - Crime 01/20/2017 Started Annealing run (491-496) on
3" wafers - Crime 01/20/2017 https://dcc.ligo.org/LIGO-T1700036
Will be done by Monday
  
  350   Wed Jun 21 17:04:20 2017 AlenaGeneralAnnealingAnnealing run (541-542) on 3" wafers - Crime 06/25/2017Started an annealing run https://dcc.ligo.org/LIGO-T1700271

Will be ready by Friday morning

 
  
  355   Tue Jun 27 09:20:16 2017 AlenaGeneralAnnealingAnnealing run (546-551) on 3" wafers - Crime 06/27/2017Started annealing run https://dcc.ligo.org/T1700293

Will be ready by June 28th afternoon
  
  75   Wed Aug 10 09:39:38 2016 GabrieleElectronicsDaily ProgressAnnuntio vobis gaudium magnum: habemus CymacYesterday I cloned the cymac2 disk and
installed it into the cymac3.

Jamie tweaked a few things (I can't
 qpd_spectra.png 
  55   Wed Jul 20 10:26:40 2016 GabrieleElectronicsConfigurationAre glitches a digital artifact?Not so sure anymore...


those glitches do not happen
at regular times
I tried to send
  
  388   Wed Aug 2 13:47:47 2017 ZachElectronicsModelingArm width Sweep2017-08-02


I ran a
sweep of the width of the ESD arms. There
appears to be a linear relationship across
 Arm_width_fine.jpgmode_25.jpg 
  233   Wed Dec 7 08:48:13 2016 GabrieleElectronicsConfigurationAuto center state written directly to dataI modified the autocenter script. Now while
the picomotor is moving, the variable X3:CR1-AUTOCENTER
takes the value 1, otherwise it is 0.
  
  283   Tue Jan 31 09:03:12 2017 GabrieleElectronicsConfigurationAuto centering script for the new setupI wrote an autocenter script for the four
QPD in the new setup (autocenter14.py) and
renamed the script for the old chamber (autocenter0.py).
  
  158   Fri Nov 4 11:31:11 2016 GabrieleElectronicsConfigurationAutocenter control and model modificationsRemoved the peak meter lock from the model,
since it's not used

Added and EPICS binary bit to control
 Screenshot-Untitled_Window.png 
  110   Wed Sep 14 20:17:33 2016 GabrieleGeneralGeneralBand-limited excitationExcitation started at 20:15:30LT, 20 seconds
long. The excitation is band-limited (10
Hz) centered around each of the predicted
  
  132   Thu Sep 29 15:40:45 2016 GabrieleOpticsDesignBeam profile of new 21mW HeNe laser and tweak of optical lever designI measured the beam profile of the new
Thorlabs HeNe (21.8 mW measured). The beam
waist is 355 microns, very close to the laser
 beam_profile_all.png 
  352   Thu Jun 22 15:37:20 2017 ZachElectronicsModelingBeginning modeling2017-06-22


Created
the geometry of the ESD by creating blocks
and joining them with Unions. I then created
 E_Plot.png 
  351   Thu Jun 22 13:16:37 2017 ZachElectronicsModelingBeginning with COMSOL2017-06-21


4:30 pm-
Installed COMSOL, began modeling current
ESD by creating parameters and the first
  
  192   Wed Nov 16 09:43:25 2016 Gabriele, AlastairGeneralDaily ProgressCO2 laser polishing setupYesterday we assembled the lase polishing
system. The Co2 laser power can be controlled
using a waveplate, so we can turn on the
 2016-11-15_16.20.23.jpg2016-11-15_16.35.14.jpg2016-11-15_16.35.14.jpg 
  198   Thu Nov 17 17:59:44 2016 Gabriele, AlastairGeneralGeneralCO2 laser polishing testsWe improved the control software of the
laser polishing system: now the rotation
speed is large when the laser is missing
 2016-11-17_14.30.00.jpg2016-11-17_14.22.53.jpg 
  448   Tue Dec 19 10:06:04 2017 GabrieleGeneralMeasurementsCO2 polished UW substratesThe four surviving University Wafers 76.2mm/0.5mm
wafers have been CO2 polished. They are identified
by numbers from 1 to 4 on the container.
  
  449   Tue Jan 2 15:32:39 2018 GabrieleGeneralMeasurementsCO2 polished UW substrates2018-01-02

After annealing


3:25pm in chamber, as before
3:28pm
roughing pump on
3:40pm turbo
  
  467   Tue Feb 27 14:39:21 2018 GabrieleGeneralGeneralCO2 polishingPolished S1600619 S1600620 S1600621 S1600622   
  471   Thu Mar 1 13:20:33 2018 GabrieleGeneralGeneralCO2 polishingCO2 polishing:


S1600584
S1600587
S1600588:
laser tripped near the end, restarted for
  
  199   Fri Nov 18 09:27:26 2016 GabrieleGeneralMeasurementsCO2 polishing improves the Q !!The plot below shows that the Q values
of S1600439 improved a lot after the CO2
laser polishing. About 15 modes have Q above
 results_2016_11_17b.pngpolished_Qs.png 
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